body {
  background-color: #22252A;
  margin: 0px;
  -webkit-app-region: drag;
  -webkit-user-select: none;
  color: #92959a;
  font-family: 'Microsoft YaHei' !important;
  font-weight: 400;
}

div {
  font-family: 'Microsoft YaHei';
}

button {
  -webkit-app-region: no-drag;
}